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Commit 8587f78b authored by Pierre Lalet's avatar Pierre Lalet
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Merged in gvaladon/scapy-issues/Issue #5116 - IPv6 & UDP.chksum == 0 (pull request #112) 

Issue #5116 fixed
parents e71f936d 12d9d943
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scapy/layers/inet.py
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...@@ -517,6 +517,9 @@ class UDP(Packet): ...@@ -517,6 +517,9 @@ class UDP(Packet):
p = p[:6]+struct.pack("!H", ck)+p[8:] p = p[:6]+struct.pack("!H", ck)+p[8:]
elif isinstance(self.underlayer, scapy.layers.inet6.IPv6) or isinstance(self.underlayer, scapy.layers.inet6._IPv6ExtHdr): elif isinstance(self.underlayer, scapy.layers.inet6.IPv6) or isinstance(self.underlayer, scapy.layers.inet6._IPv6ExtHdr):
ck = scapy.layers.inet6.in6_chksum(socket.IPPROTO_UDP, self.underlayer, p) ck = scapy.layers.inet6.in6_chksum(socket.IPPROTO_UDP, self.underlayer, p)
# According to RFC2460 if the result checksum is 0, it should be set to 0xFFFF
if ck == 0:
ck = 0xFFFF
p = p[:6]+struct.pack("!H", ck)+p[8:] p = p[:6]+struct.pack("!H", ck)+p[8:]
else: else:
warning("No IP underlayer to compute checksum. Leaving null.") warning("No IP underlayer to compute checksum. Leaving null.")
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